seia.js/dist/plugins/detect-boundaries.js

Lightweight SSR framework for React Server Components

import { match } from 'ts-pattern';
import { trimPrefix } from '../utils.js';
export const detectBoundaries = ({ config: { root } })=>{
    const boundaries = new Set();
    return {
        name: 'seia:detect-boundaries',
        moduleParsed ({ id, ast }) {
            if (ast?.body.filter((node)=>match(node).with({
                    type: 'ExpressionStatement',
                    expression: {
                        type: 'Literal',
                        value: 'use client'
                    }
                }, ()=>true).otherwise(()=>false))?.length) boundaries.add('.' + trimPrefix(id, root));
        },
        buildEnd () {
            this.emitFile({
                type: 'asset',
                name: 'boundaries-manifest.json',
                needsCodeReference: false,
                source: JSON.stringify([
                    ...boundaries
                ])
            });
        }
    };
};